Theobald De Blois, Count of Blois I
913 - 975 (62 years)
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 | Avice Alice Fitzmartin 1072- |
| Avice Alice Fitzmartin | |
| B: | 1072 |
| Somerset | |
| D: | Lancashire |
| Baron William Fitzmartin, II of Blagdon Cemise and Dartington | |
| B: | 1160 |
| Blagdon, Somerset | |
| D: | 1215 |
| Galway, Ireland | |
| Baroness Avice De Torrington 1165-1246 |
| Baroness Avice De Torrington | |
| B: | 1165 |
| D: | 1246 |
| Baron William Fitzmartin, I of Cemais 1135-1216 |
| Baron William Fitzmartin, I of Cemais | |
| B: | 1135 |
| Dynevor, Carmarthenshire, Wales | |
| D: | 1216 |
| Combe Martin Manor, Barnstaple, Devonshire, England | |
| Lady Angharad Verch Rhys, Princess of South Wales | |
| B: | 1140 |
| Llandilo, Carmarthenshire, Wales | |
| M: | 1159 |
| Dartington, Devon | |
| D: | Aug 1226 |
| Dynevor Castle, Llandilo, Carmarthenshire, Wales | |
| Baron Robert Fitzmartin, I of Blagdon 1084-1159 |
| Baron Robert Fitzmartin, I of Blagdon | |
| B: | 1084 |
| Cemmaes, Machynlleth, Powys, Wales | |
| D: | 1159 |
| Barnstaple, Devon | |
| Baroness Alice De Nonant 1100-1175 |
| Baroness Alice De Nonant | |
| B: | 1100 |
| Broad Clyst, Devon | |
| M: | 1135 |
| D: | 1175 |
| Totnes, Devon | |
| Baron Martin De Tours of Cemais 1030-1086 |
| Baron Martin De Tours of Cemais | |
| B: | 1030 |
| Tours, Bayeux, Normandy, France | |
| D: | 1086 |
| Dartington, Devon | |
| Lady Geva De Burci, of Falaise 1055-1107 |
| Lady Geva De Burci, of Falaise | |
| B: | 1055 |
| Pitminster, Somerset | |
| M: | 1069 |
| Newport, Shropshire | |
| D: | 1107 |
| Worspring Manor, Somerset, England | |
| Nicholaus De Blois De Caineis, Count of Carentan | |
| B: | 1008 |
| Blois, Loir-et-Cher, Centre, France | |
| D: | 1052 |
| Carentan, Manche, Basse-Normandie, France | |
| Oda De Conteville 993-1023 |
| Oda De Conteville | |
| B: | 993 |
| D: | 1023 |
| Bertha De Blois 1010-1085 |
| Bertha De Blois | |
| B: | 1010 |
| Blois, Loir-et-Cher, Centre, France | |
| D: | 1085 |
| Chartres, Ille-et-Vilaine, Bretagne, France | |
| Thibaut De Blois, III 1010-1089 |
| Thibaut De Blois, III | |
| B: | 1010 |
| Blois, Loir-et-Cher, Centre, France | |
| D: | 1089 |
| Champagne, Dordogne, Aquitaine, France | |
| Almodis De Blois 1011-1095 |
| Almodis De Blois | |
| B: | 1011 |
| Bois Leveque, Normandy, France | |
| D: | 1095 |
| France | |
| Étienne De Blois 1015-1048 |
| Étienne De Blois | |
| B: | 1015 |
| D: | 1048 |
| Eudes De Blois, Count of Champagne II | |
| B: | 983 |
| D: | 1037 |
| Ermengarde D'auvergne, Countess of Auvergne | |
| B: | 970 |
| D: | 1040 |
| Eudes De Blois, I Count of Champagne | |
| B: | 950 |
| D: | 996 |
| Bertha De Bourgogne, of Burgundy 964-1010 |
| Bertha De Bourgogne, of Burgundy | |
| B: | 964 |
| D: | 1010 |
|
| Theobald De Blois, Count of Blois I | |
| B: | 913 |
| D: | 975 |
| Luitgardis De Vermandois 920-978 |
| Luitgardis De Vermandois | |
| B: | 920 |
| D: | 978 |